Peterson Field Guides: Hawks of North America. -FLX
Clark, William S.; Wheeler, Brian K.
A Field Guide to Warblers of North America
Dunn, Jon L.; Garrett, Kimball
A Field Guide to Hummingbirds of North America
Williamson, Sheri L.
Hummingbirds of North America: The Photographic Guide
Howell, Steve N.G.
Nests, Eggs, and Nestlings of North American Birds. Second edition.
Baicich, Paul J.; Harrison, Colin J.
Shorebirds of North America, Europe, and Asia: A Guide to Field Identification
MESSAGE, Stephen; TAYLOR, Don
Mammals of North America, Fourth edition
Kaufman Field Guide to Butterflies of North America
BROCK, Jim P.; KAUFMAN, Kenn
Peterson Field Guide to Birds of North America
PETERSON, Roger Tory
Smithsonian Field Guide to the Birds of North America
Bird Feathers: A Guide to North American Species
Scott, S. David; McFarland, Casey
Kaufman Field Guide to Insects of North America - FLX
Kaufman, Kenn; Eaton, Eric R.